The popular G3T-R Genie 3-Button Garage Door Opener Remote features Genie Intellicode Security technology to keep your garage secure while you're home or away. The access code is changed on each door activation to prevent unauthorized access to your property. It is also equipped with Auto-Seek Dual Frequency technology, this garage door opener remote will automatically seek either 315 or 390 MHz, which will minimize interference from close surrounding devices and improves overall performance. The 3-Button G3T-R remote works up to 3 garage door opener systems manufactured from 1997 to the present.